Registering speedometer



March 19, 192,9. K, GERGLER, JR 1,706,152 A REGISTERING sPEEDoME'rER Filed April 19. 1926 votherwise he possible.

Patented Mar. 19, 1929.

UNITED STATES PATENT GFFICE.

REGISTERING SPEEDOMETER.

Application led April 19, 1926', Serial' No. 103,089, and in Germany July 27, 1925.

Speedonicters are already known in which a registering hand is moved unitornlly hy Clockwork mechanism, distances loeing` indicated hy needle pricks, holes, or the like. The holes made in the renisteri ..ggl hand lie more or less closely tog-ether in a straight line, the spaces dependingv upon the speed of the vehicle. lWhen the speed ot the vehicle is very high it sometimes happens that the separate holes are so closely together that theyY almost out the hand across.

It has also heen proposed to the holes or impressions so that a larger number of them can he made in series than would In speedometers of this type the registering hand or sheet is Wound around drum, which rotates While the actual holes are set laterally With respect to one another. In such a mechanism there is savingin the registering` hand, het the holes are close together and form a continuous, although curvilinear line, which in certain cases may likewise produce a cutting line it the holes are quite close together,

These disadvantages are ohviated hy the speedometer provided accordingto the invention. ln this rnecl'lanisin tivo needles are provided side by side., which are operated alternately. By this arrangement there Vis not only a saving in the registerin hand hut7 hy reason oil the 'tact that every second needle hole is in a seperate row, the hand is not out through hy the needles.

The present invention is diagrammati-cally illustrated in the accompanyine` drawings Wav ot example. In the drawings,

Figure 1 is a 'trent elevation ot the mechanism according` lto the invention with the cover plate removed Figure 2 is a section taken on the line II-Il oi Figure 1; and

Figure 3 is a section taken on the line lll-Ill of Figure 1.

ln the easing 1 rollers 2 and 3 are provided and upon them a registering' hand may he Wound and unwvound. The rollers may he rotated hy means of springs or in any other suitable manner. Thev speed at which the rollers rotate and therefore the speed at which the hand 4 moves, is controlled by a toothed Wheel l5, which is rotated uniformly hy clockwork not illustrated, and engages by its teeth 6 in holes 7 in the hand Il.

The hand 4 moves upon a guide 8, upon which it is pressed hy means oif guide mehr hers 9, and which is slotted at this position to admit the Wheel 5.

rlhe hand is perforated hy needles 1G and 11, Which are disposed according to the invention side hy side, and which are moved alternately hy a Wheel 19 which is rotated at a speed proportional to the distance travelled. The needles are guided hy the arms 12, 13 and each ot' the needles is held hy tivo springs 14, 15 Whichl at one end press against 'the arms 12, 13 and at the other end press against projections or collars 16 provided on the needles. The upper ends ot the needles are hent over in such manner that the needles can he lifted hy pins 17, 18 provided in the wheel or disc 19. It is important that the pins 17, 18 he placed one on each side ot the Wheel or dise 19 in such manner that the needles are lifted alternately. liv this means each second needle hole is in a scpai i. row, the holes are spaced sullieiently far apart and the hand cannot he cnt through.

l claim:

ln a registerini` speedometer h ming;V punching` means tor recording; distance marks on a travelling' hand including' a guide coinposed ot spaced arms7 a pair needles mounted side hy side tor vertical reciprocation in the arms of the guide, a collar on each needle, tvvo springs positioned shout each needle and hearing aeainst the collar and adjacent arms oit the e arranged to normally hold each needle out ot' contact with the hand, the upper ends et the needles having' antjularlv hent engaging' portions, a Wheel rotatably mounted shove and hetwec] the needles, and pins provided ugon op n e sides oli said Wheel and diametricallv opposed With respect to each other tor cooperating' with the engaging'portions ot the needles to alternatel7 raise and release the needles to permit the `upper spring of each needle to project the needles through the band.

KARL GERGLER, JUN. 

